I throw about a cup of (NatureSmart organic) scratch per morning to my nine hens. (It is consumed before roosting time every evening so it isn't necessary to scoop away leftovers.) Their main diet consists of organic layer crumbles, bugs, and forage greens from the lawn. -don't think it is necessary to feed scratch. I just think they literally like "scratching" stuff around on the ground and pecking through stuff.